Machine for making paper pails



N0. 6l3,54|. Patented m. I, I898. E. c. WESTERVELT.

MACHINE FOR MAKING PAPER PAILS.

(Application filed Mar. 1, 1898.)

2 Sheets-Sheet I.

(No Model.)

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No. 6l3,5 4|. Pa tenfed Nov. I I898.

' E. c. WESTERVELT.

MACHINE FOR MAKING PAPERPAILS.

7 (Application filed Mar. 1, 1898.) (No Model.)

2 Sheets-Sheet 2.

will" I WW illlflmil illlliiin WIHIUHWWMWWHIHMM mu Q 7 are rigidly secured to the uprights A, as in- NITED STATES PATENT FrrcE.

MACHINE FOR MAKING PAPER PAlLS.

To all whom it may concern.-

Be it known that I, EDMUND O. Wnsrna VELT, of South Bend, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Machines for Making Paper Pails; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.

This invention is an improved pail-making machine especially adapted for molding hollow vessels like pails, buckets, 850. Its principal object is to provide a novel expansible and contractible head-section for the mold and also to provide a novel contractible body for the mold.

The invention consists in the combination and construction of parts set forth in the claims and will be clearly understood from the following description in connection with the accompanying drawings, to which I refer by letters of reference marked thereon.

Figure 1 is a side elevation of the complete molding-machine, partly in section. Fig. 2 is a transverse sectional view of the machine on line 2 2, Fig. 1. Fig. 3 is a top plan view of the adjustable head, showing some of the segments in their projected or expanded position and others of them in retracted or contracted position, others of the plates being removed to more clearly illustrate the construction of the head. Figs. 4 and 5 are details.

The main frame of the machine comprises two or more uprights A, mounted upon a suitable base A and rigidly connected at the top by a bar or plate A These uprights form guides for a vertically-movable platform B, which may be raised and lowered by means of a piston B, operated by hydraulic or other suitable power in the usual manner. Sup ported upon this platform B is a perforated former b, which is surrounded by an adj ustable mold O, formed by an annular series of overlapping sections 0, each of which is provided on its outer surface with a radiallyprojecting rib 0, formed with an upper cam c and lower cam 0 each cam being respectively adapted to engage the inner periphery of upper and lower annuli D and D, which SPECIFICATION forming part of Letters Patent No. 613,541, dated November 1, 1898.

Application filed March 1, 1898. 'Serial No. 672,300. (No model.)

dicated in the drawings. The ribsc are also provided with a shoulder 0 intermediate the cams o c ,which is adapted to catch upon the lower annulus D and suspend the mold thereon when the platform is lowered. I When the platform is raised, the cams c c engage the annuli D D and force the sections 0 inward, thereby contracting the mold and lessening the area of the inner chamber thereof more or less, according to the amount the platform is raised.

The bottom of the mold is closed by the platform B,which is perforated at b beneath the former bto allow the escape of any water exuded from the compressed pulp. The top of the mold is expansible and contractible with the sides and is of peculiar construction. It consists of a disk E, attached to the lower end of a pipe H,which extends up through bar A and is connected to the pulp-reservoir by any suitable means. The lower end of this pipe is closed by a valve it, connected to a rod h, which extends upward and through the pipe and is connected to a handle W, by which the surfacesof which are flush with the segments 6. The segments e are provided near their inner ends with projecting ribs 6 which enter corresponding slots g in the inner ends of movable segments G, which are placed over segments 6. These segments G are larger than the segments 6 and will lap over the edges of the slides F, as indicated in Fig. 3. The segments G are normally projected outward by means of coil-springs G, which are attached to the center of disk E at one end, while their other ends engage in eyes G on the inner ends of segments G. The plates F are also normally projected outwardly by means of springs F, similar to springs G and alternating with the latter, being attached at one end to disk E and at the other to eyes f on the inner ends of plates F, as shown.

The disk, plates, and segments form a contractible and expansible head which is placed in the upper end of mold O and is contracted by the contraction of the latter and serves to expand the mold when the latter is lowered or released by the annuli D D, the plates F and G being thrown outward by their springs as the mold is freed, thus always maintaining close joints between the upper end of the mold and the head.

To the pipe H above the head is attached a bar I, which moves up and down with the pipe and head and is guided on the uprights. Stout coil-springs J are placed on the uprights above bar I, the object of which is hereinafter explained.

The operation of the device is as follows: The mold C is mounted upon the movable platform 13, which also carries a perforated former b. When the headE is placed within terial thereupon.

the mold, the springs F G force the movable parts F G outwardly against the inside of the mold-sections, thus making a comparatively tight chamber around the former within the mold. The valve his now opened and allows fluid pulp to flow into the space between the former and the mold until it is filled. Then the platform is raised, carrying the mold and former up through the stationary annuli D D, which, engaging the cams c 0 contract the mold around the former and solidify the ma- As the entire pail=forming apparatus is raised upward and the sides compressed the movable parts of the adjustable head are also forced inward, and thus it will accommodate itself to the changing shape of the mold. The pipe H and beam I rise within the mold; but in case the movement becomes too rapid for the proper escape of the water through the perforated former the head and bar I will be raised slightly and compress the springs J, thus allowing a slight yield to the head, although the springs J are sufiicient to resist the ordinary upward pressure of the mold. Then the material is suiiiciently compressed, the platform Bis lowered and the shoulders c of the mold catch on the lower annulus D, and the mold will remain suspended, while the former and the compressed material or pail thereon will descend with the platform far enough to allow the pail to be lifted olf the former and removed to the drying-frame. As the mold is lowered the expansible head tends to expand it, so that it is in condition to again cooperate with the former. The platform is then raised until the mold rests thereon again around the former. Then the liquid pulp is again admitted and a new pail is formed, as described.

Obviously the invention would be the same if platform B was made stationary and the uprights and connected parts were movable.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a molding-machine, the combination of a former, and an adjustable mold comprising a series of sections each provided with an outwardly-projecting rib having cam-sun faces, adapted to engage opposed surfaces and cause the contraction of the mold, with the adjustable head in the upper end of the mold, a pipe for admitting pulp into the mold, the movable bar attached to said pipe and springs for allowing the movement of the head under undue pressure, substantially as described.

2. In a molding-machine, the combination of the uprights, the annuli fixed thereon, the platform bearing a former, and the adjustable mold comprising a series of sections each provided with an outwardly-projecting rib having cam-surfaces adapted to engage the aunuli, with the adjustable head in the upper end of the mold, the valved pipe for admitting pulp into the mold, the movable bar attached to said pipe, and the springs interposed between said bar and the top of the frame, for the purpose and substantially as described.

3. An eXpansible head for molding-machines comprising a series of independent radially-movable plates and a series of radially-movable segments located between and overlapping said plates, substantially as described.

l. A head for molding-machines comprising a disk, radially-movable segments mounted on said disk and a series of independent radially-movable plates underlying the edges of said segments, and means for moving said plates and segments, substantially as described.

5. A head for molding-machines, comprising a disk, radial ribs thereon, radially-movable segments mounted on said disk and guided by said ribs, springs for thowing said segments outwardly, a series of independent radially-movable plates underlying the proximate edges of said segments and springs for moving said plates outward, substantially as described.

6. An adjustable head for molding-ma chines consisting of a disk having a series of radial channels in its upper surface and a series of radially-movable plates in said channels, with a series of radially-movable segments guided on the disk intermediate the channels and overlapping the edges of the plates, and means for moving said segments and plates, substantially as described.

7. The herein-described adjustable head for molding-machines comprising a disk having fixed segments thereon and slots intermediate said segments, and radially-movable plates in said slots; with radially-movable segments overlying the fixed segments, with their edges overlapping the plates, substantially as and for the purpose described.

8. The herein-described adjustable head for molding-machines comprising a disk having fixed segments thereon provided with ribs, and slots intermediate said segments; the radially-movable plates in said slots and springs for moving said plates outward; with the radially-movable segments overlying the fixed segments and guided by the ribs therein and overlapping the plates and the springs for moving said movable segments outward, substantially as and for the purpose described.

9. The hereindescribed molding-machine comprising a base, the uprights thereon, the annuli D, D, fixed on said uprights, the platform guided by said uprights, means for raising and lowering said p1atform,and the former mounted on said platform, with a mold composed of sections having outwardly-projecting ribs provided With cams c and 0 respec tively adapted to engage the annuli D, D, and also having shoulders 0 adapted to sus- 

